gcc/testsuite/gcc.c-torture/execute/921204-1.c

   1 typedef struct {
   2   unsigned b0:1, f1:17, b18:1, b19:1, b20:1, f2:11;
   3 } bf;
   4
   5 typedef union {
   6   bf b;
   7   unsigned w;
   8 } bu;
   9
  10 bu
  11 f(bu i)
  12 {
  13   bu o = i;
  14
  15   if (o.b.b0)
  16     o.b.b18 = 1,
  17     o.b.b20 = 1;
  18   else
  19     o.b.b18 = 0,
  20     o.b.b20 = 0;
  21
  22   return o;
  23 }
  24
  25 main()
  26 {
  27   bu a;
  28   bu r;
  29
  30   a.w = 0x4000000;
  31   a.b.b0 = 0;
  32   r = f(a);
  33   if (a.w != r.w)
  34     abort();
  35   exit(0);
  36 }